Year	Percent
1950	7.49981
1955	9.76216
1960	10.49876
1965	8.61554
1970	7.99507
1975	7.80146
1980	7.99454
1985	8.11895
1990	7.69971
1995	7.22387
2000	6.57967
2005	5.83278
2010	5.55699
2015	5.20457
2020	5.10139
2025	5.07225
2030	5.00488
2035	4.8988
2040	4.80173
2045	4.73596
2050	4.69587
2055	4.69898
2060	4.71271
2065	4.70484
2070	4.687
2075	4.66679
2080	4.66551
2085	4.68166
2090	4.69827
2095	4.69578
2100	4.67626